// 发现音乐里的推荐歌单详情模块
<template>
  <div class="playlist"
       v-loading="loading">
    <!-- 顶部标题详情 -->
    <div class="playlist-top-card">
      <div class="playlist-img-wrap">
        <img :src="playlistInfo.coverImgUrl"
             alt="">
      </div>
      <div class="playlist-info">
        <div class="playlist-name">
          <div class="tag1">歌单</div>{{playlistInfo.name}}
        </div>
        <div class="playlist-user-info">
          <div class="playlist-user-avatar">
            <img :src="playlistUserAvatar"
                 alt="">
          </div>
          <div class="playlist-user-name">{{playlistUserNickname}}</div>
          <div class="playlist-create-time">
            <span>{{playlistInfo.updateTime}}</span> 创建
            <span>共{{trackIds.length}}首</span>
          </div>
        </div>
        <div class="playAllBtn iconfont icon-play"
             @click="playAll"> 播放全部</div>
        <div class="playlist-tags">
          <span>标签：</span>
          <span v-for="(item,index) in playlistInfo.tags"
                :key="index"
                class="tags">{{item}}</span>
        </div>
        <div class="playlist-desc">
          <span>简介：</span>
          <span :title="playlistInfo.description">{{playlistInfo.description}}</span>
        </div>
      </div>
    </div>
    <!-- 歌单详情 -->
    <div class="playlist-tabs-wrap">
      <el-tabs v-model="activeName">
        <el-tab-pane label="歌曲列表"
                     name="first">
          <div class="songs-table">
            <el-table :data="tableData"
                      stripe
                      @row-dblclick="play"
                      v-el-table-infinite-scroll="loadMore"
                      infinite-scroll-delay=500
                      infinite-scroll-disabled="noMore">
              <el-table-column type="index"
                               width="50"></el-table-column>
              <el-table-column width="100">
                <template slot-scope="scope">
                  <div class="img-wrap">
                    <img v-lazy="scope.row.al.picUrl"
                         alt="">
                    <p class="iconfont icon-play"
                       @click="play(scope.row)"></p>
                  </div>
                </template>
              </el-table-column>
              <el-table-column prop="name"
                               label="音乐标题"
                               width=""></el-table-column>
              <el-table-column prop="artistInfo"
                               label="歌手"
                               width="">
                <template slot-scope="scope">
                  <div v-for="(singer,i) in scope.row.ar"
                       :key="i"
                       style="cursor:pointer;color:#2980b9;display:inline-block"
                       @click="toArtist(singer.id)">{{singer.name}}<span style="color:#606266;margin:0 5px"
                          v-show="scope.row.ar.length != 1 && i!=scope.row.ar.length-1">/</span></div>
                </template>
              </el-table-column>
              <el-table-column prop="al.name"
                               label="专辑">
                <template slot-scope="scope">
                  <span style="cursor:pointer;color:#2980b9;"
                        @click="toAlbum(scope.row.al.id)">{{scope.row.al.name}}</span>
                  <span class="plus"
                        title="添加至歌单"
                        @click="addToQueue(scope.row,$event)"
                        style="top:20px">+</span>
                </template>
              </el-table-column>
              <el-table-column prop="dt"
                               label="时长"
                               width="100"></el-table-column>
            </el-table>
          </div>
        </el-tab-pane>
        <el-tab-pane :label="`评论(${playlistInfo.commentCount})`"
                     name="second">
          <div class="comment-wrap"
               v-if="hotComments.length!=0">
            <h4 class="comment-title">最热评论({{hotComments.length}})</h4>
            <ul>
              <li v-for="(item,index) in hotComments"
                  :key="index">
                <img v-lazy="item.user.avatarUrl"
                     alt=""
                     class="comment-avatar">
                <div class="comment-info">
                  <div class="comment">
                    <span class="comment-user">{{item.user.nickname}}:</span>
                    <span class="comment-content">{{item.content}}</span>
                  </div>
                  <div class="re-comment"
                       v-if="item.beReplied.length!=0">
                    <span class="comment-user">@{{item.beReplied[0].user.nickname}}:</span>
                    <span class="comment-content">{{item.beReplied[0].content}}</span>
                  </div>
                  <div class="comment-bottom">
                    <p class="comment-time">{{item.time}}</p>
                    <span class="comment-time iconfont icon-dianzan">{{item.likedCount}}</span>
                  </div>
                </div>
              </li>
            </ul>
          </div>

          <div class="comment-wrap">
            <h4 class="comment-title">最新评论({{playlistInfo.commentCount-hotComments.length}})</h4>
            <ul>
              <li v-for="(item,index) in comments"
                  :key="index">
                <img v-lazy="item.user.avatarUrl"
                     alt=""
                     class="comment-avatar">
                <div class="comment-info">
                  <div class="comment">
                    <span class="comment-user">{{item.user.nickname}}:</span>
                    <span class="comment-content">{{item.content}}</span>
                  </div>
                  <div class="re-comment"
                       v-if="item.beReplied.length!=0">
                    <span class="comment-user">@{{item.beReplied[0].user.nickname}}:</span>
                    <span class="comment-content">{{item.beReplied[0].content}}</span>
                  </div>
                  <div class="comment-bottom">
                    <p class="comment-time">{{item.time}}</p>
                    <span class="comment-time iconfont icon-dianzan">{{item.likedCount}}</span>
                  </div>

                </div>
              </li>
            </ul>
            <Pagination :total="total"
                        :pageSize="pageSize"
                        :nowPage="page"
                        @changePage="handleCurrentChange" />
          </div>

        </el-tab-pane>
      </el-tabs>
    </div>
    <!-- 添加歌曲至播放列表 -->
    <div class="add-ball iconfont icon-yinfu"
         v-show="showAddBall"
         ref="addBall"></div>
  </div>
</template>

<script>
import { formatDate, formatDateFully } from '../../utils/utils'
import elTableInfiniteScroll from 'el-table-infinite-scroll'
import { playlistDetailAPI, songInfoAPI, playMusicAPI, commentsAPI } from '@/utils/api'
import Pagination from '@/components/Pagination.vue'

export default {
  data () {
    return {
      activeName: 'first',
      playlistInfo: {},
      playlistUserAvatar: "",
      playlistUserNickname: "",
      trackIds: [],
      tableData: [],
      comments: [],
      hotComments: [],
      total: 0,
      pageSize: 10,
      page: 1,
      playlistId: "",
      loading: true,
      loadBegin: 0,
      allData: [],
      showAddBall: false
    }
  },
  components: {
    Pagination
  },
  directives: {
    'el-table-infinite-scroll': elTableInfiniteScroll
  },
  created () {
    console.log(this.$route.query.id)
    let playlistId = this.$route.query.id
    this.playlistId = playlistId

    this.getTableData()

    setTimeout(() => {
      this.loadAll()
    }, 1000);
  },
  computed: {
    noMore () {
      return this.tableData.length >= this.trackIds.length
    },
    nowIndex () {
      return this.$store.state.nowIndex
    },
    musicQueue () {
      return this.$store.state.musicQueue
    },
    queuePos () {
      return this.$store.state.queuePos
    }
  },
  methods: {
    toArtist (id) {
      this.$router.push(`/artist?artistId=${id}`)
    },
    toAlbum (id) {
      this.$router.push(`/album?id=${id}`)
    },
    handleCurrentChange (page) {
      this.page = page
      this.getComments()
    },
    loadMore () {
      console.log('滚动加载')
      this.loading = true
      this.loadBegin += 20
      this.getTableData()
    },
    loadAll () {
      console.log('loadAll')
      let ids = []
      for (let item of this.trackIds) {
        ids.push(item.id)
      }
      let idsStr1 = ids.join(",")
      this.getTracks(idsStr1, true)
    },
    addToQueue (row, e) {
      let obj = {
        id: row.id,
        imgUrl: row.al.picUrl,
        duration: row.dt,
        artistInfo: row.ar,
        songName: row.name
      }

      let ids = []
      for (const item of this.musicQueue) {
        ids.push(item.id)
      }
      if (ids.indexOf(obj.id) == -1) {
        this.beginAnimation(e.x, e.y)

        setTimeout(() => {
          this.$store.commit('changeQueueStyle', 'add')
          this.$store.commit('changeMusicQueue', obj)
        }, 500);


        setTimeout(() => {
          this.$store.commit('changeQueueStyle', 'normal')
        }, 1000);
      } else {
        this.$message({
          type: 'warning',
          message: "已存在播放列表哦",
          showClose: true
        })
      }
    },
    beginAnimation (x, y) {
      this.showAddBall = true
      let endX = this.queuePos.left
      let endY = this.queuePos.top
      console.log('起始位置 x:' + x + ' y:' + y)
      console.log('终点位置 x:' + endX + ' y:' + endY)

      let el = document.querySelector(".add-ball")
      el.style.left = x + 'px'
      el.style.top = y + 'px'

      setTimeout(() => {
        el.style.left = endX + 'px'
        el.style.top = endY + 'px'
      }, 0);

      setTimeout(() => {
        this.showAddBall = false
      }, 500);
    },
    getTableData () {
      playlistDetailAPI({ id: this.playlistId }).then(res => {
        // console.log(res)
        this.playlistInfo = res.data.playlist
        this.playlistUserAvatar = res.data.playlist.creator.avatarUrl
        this.playlistUserNickname = res.data.playlist.creator.nickname
        this.trackIds = res.data.playlist.trackIds
        this.playlistInfo.updateTime = formatDate(new Date(this.playlistInfo.updateTime))

        let idsArray = []
        for (let item of this.trackIds) {
          idsArray.push(item.id)
        }
        if (this.loadBegin + 20 >= idsArray.length)
          idsArray = idsArray.slice(this.loadBegin)
        else
          idsArray = idsArray.slice(this.loadBegin, this.loadBegin + 20)//歌单歌曲的数量
        let idsStr = idsArray.join(",")

        // 这一段bug
        Promise.all([this.getTracks(idsStr, false), this.getComments(true)]).then(() => {
          console.log('1111')
        })

      }).then(() => {
        this.loading = false
      })
    },
    getTracks (trackId, all = false) {
      songInfoAPI({ ids: trackId }).then(res => {
        console.log(res)
        let pushList = []
        for (let item of res.data.songs) {
          let duration = item.dt
          let min = parseInt(duration / 60000).toString().padStart(2, '0')
          let second = parseInt((duration - min * 60000) / 1000).toString().padStart(2, '0')
          item.dt = `${min}:${second}`

          pushList.push(item)
        }

        if (all) {
          this.allData = this.allData.concat(pushList)
          console.log('loading all.......')
        } else {
          this.tableData = this.tableData.concat(pushList)
          console.log('loading a little')
        }

      })
    },
    play (row) {
      console.log(row)
      let id = row.id
      playMusicAPI({ id }).then(res => {
        if (res.data.data[0].url) {
          this.songUrl = res.data.data[0].url

          let musicInfo = {
            imgUrl: row.al.picUrl,

            artistInfo: row.ar,
            songName: row.name,
            id: row.id,
            duration: row.dt
          }

          this.$store.commit("changeMusicUrl", this.songUrl)
          this.$store.commit("changeMusicInfo", musicInfo)
          this.$store.commit("changeMusicStatus", false)
          this.$store.commit("changeMusicQueue", musicInfo)

          let ids = []
          for (const item of this.musicQueue) {
            ids.push(item.id)
          }
          this.$store.commit("changeNowIndex", ids.indexOf(musicInfo.id))

        } else {
          this.$message({
            showClose: true,
            message: '对不起，歌曲暂时无法播放。',
            type: 'error'
          });
        }
      })
    },
    getComments (isFirst = false) {
      this.loading = true
      let params = {
        id: this.playlistId,
        limit: this.pageSize,
        offset: (this.page - 1) * this.pageSize
      }
      commentsAPI(params, 'playlist').then(res => {
        console.log(res)

        for (let item of res.data.comments) {
          item.time = formatDateFully(new Date(item.time))
        }

        if (isFirst) {
          if (Object.prototype.hasOwnProperty.call(res.data, 'hotComments')) {
            for (let item of res.data.hotComments) {
              item.time = formatDateFully(new Date(item.time))
            }
            this.hotComments = res.data.hotComments
          }
        }

        this.total = this.playlistInfo.commentCount - this.hotComments.length
        this.comments = res.data.comments
      })

      setTimeout(() => {
        this.loading = false
      }, 500);
    },
    playAll () {
      let allSongs = this.allData
      this.$store.commit('clearMusicQueue')
      for (const item of allSongs) {
        let obj = {
          duration: item.dt,
          id: item.id,
          imgUrl: item.al.picUrl,
          artistInfo: item.ar,
          songName: item.name
        }
        this.$store.commit('changeMusicQueue', obj)
      }
      // 若第一首歌无版权无法播放，会出现bug，自动播放也是
      this.$store.commit('changeNowIndex', 0)
      this.play(allSongs[0])
    }
  },
}
</script>

<style scoped>
@import "../../assets/common/tab.css";

.add-ball {
  position: fixed;
  color: #5292fe;
  transition: top 0.5s ease-in, left 0.5s linear;
}

ul {
  list-style: none;
}

.plus {
  padding: 10px;
  border-radius: 50%;
  margin-left: 10px;
  font-size: 25px;
  position: absolute;
  left: -80px;
  top: 0;
  font-weight: bold;
  cursor: pointer;
  display: none;
}

.songs-table .el-table__row:hover .plus {
  display: block;
}

.playlist {
  max-width: 1300px;
  margin: 0 auto;
  padding: 20px;
}

.playlist-top-card {
  display: flex;
  /* height: 300px; */
}

.playlist-img-wrap {
  width: 200px;
  height: 200px;
}

.playlist-img-wrap img {
  width: 100%;
  height: 100%;
}

.playlist-info {
  padding: 0 20px;
  flex: 1;
}

.playlist-info .tag1 {
  color: #5292fe;
  border: 1px solid #5292fe;
  display: inline-block;
  font-size: 20px;
  margin-right: 10px;
  border-radius: 5px;
  padding: 0px 7px;
  cursor: default;
}

.playlist-name {
  font-size: 25px;
  font-weight: 600;
  display: flex;
  align-items: center;
}

.playlist-user-info {
  display: flex;
  align-items: center;
  font-size: 14px;
}

.playlist-user-info img {
  margin: 10px 0;
}

.playlist-user-avatar img {
  height: 30px;
  width: 30px;
  border-radius: 50%;
}

.playlist-user-name {
  margin: 0 10px;
}

.playAllBtn {
  display: inline-block;
  margin-right: 10px;
  border-radius: 20px;
  background: #5292fe;
  padding: 5px 15px;
  color: #fff;
  cursor: pointer;
}

.playlist-tags {
  margin: 10px 0;
}

.playlist-desc {
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.playlist-desc span:nth-of-type(2) {
  font-size: 14px;
}

.playlist-tags .tags {
  font-size: 14px;
}

.playlist-tags .tags:not(:last-of-type)::after {
  content: "/";
  margin: 0 4px;
}

.playlist-tabs-wrap {
  margin-top: 20px;
}

.el-table td,
.el-table th.is-leaf {
  border-bottom: none;
}

.el-table::before {
  opacity: 0;
}

.songs-table {
  width: 100%;
}

/* 设置滚动条样式 */
/* 滚动条整体样式 */
.songs-table >>> ::-webkit-scrollbar {
  width: 5px;
  height: 1px;
}
/* 滚动条里面的小方块 */
.songs-table >>> ::-webkit-scrollbar-thumb {
  border-radius: 4px;
  box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.2);
  background: #f2f2f2;
}
/* 滚动条里面的轨道 选择不显示 */
.songs-table >>> ::-webkit-scrollbar-track {
  box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.2);
  border-radius: 4px;
  background: #fff;
}

.img-wrap {
  width: 60px;
  height: 60px;
  position: relative;
}

.img-wrap img {
  width: 100%;
  height: 100%;
  border-radius: 10px;
}

.img-wrap p::before {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 30px;
  height: 30px;
  background-color: rgba(255, 255, 255, 0.8);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  color: #c0392b;
  font-size: 14px;
  cursor: pointer;
}

.comment-title {
  margin-bottom: 20px;
}

.comment-wrap ul li {
  display: flex;
  margin: 10px 0 30px 0;
}

.comment-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
}

.comment-info {
  flex: 1;
  font-size: 14px;
  margin-left: 10px;
}

.comment {
  margin-bottom: 10px;
}

.comment-user {
  color: #517eaf;
  margin-right: 10px;
  cursor: pointer;
}

.comment-content {
  display: inline;
}

.comment-time {
  color: grey;
  margin-right: 20px;
  margin-top: 5px;
}

.comment-bottom {
  display: flex;
  align-items: center;
  font-size: 14px !important;
}

.re-comment {
  background-color: #f3f1f3;
  padding: 5px 10px;
  color: rgba(0, 0, 0, 0.6);
  margin-bottom: 5px;
}
</style>